It's all about simplicity, elegance, and a hint of desperation.
Principle of Least Surprise: The fewer materials, the better. Less stuff to worry about, less stuff to go wrong.
Principle of Occam's Razor: The simplest explanation is often the correct one. Unless you're talking about the plot of a soap opera, in which case, anything goes.
Principle of Just-Enough-ness: When in doubt, just use enough.
Learn more about Principle of Just-Enough-ness.
Learn about the Principle of Monochromaticism.
The IKEA Bookshelf: A classic example of the Principle of Least Surprise. Only the essentials, only the necessities.
The Google Doodle: A masterclass in Principle of Just-Enough-ness. Who knew simplicity could be so much fun?
The Swiss Army Knife: A testament to the Principle of Occam's Razor. You never know when you'll need 17 different functions in one place.